NetGrouper is a wrapper for Actionscript 3.0’s NetGroup and RTMFP Multicasting abilities. It is intended to create quick P2P multiplayer games over local networks or Adobe Cirrus.

The lib provides an abstraction of P2P communication, which simplifies the process of communicating among game points. It can connect using a local network, but it might fail under multiple firewalls. In those cases the Cirrus multicast is preferable. The library works best for applications meant to have less than 13 simultaneous real-time connections.